Synonyms for Hard-core

Synonyms starting with letter O

• obstinate

  dedicated, dyed-in-the-wool
• obscene

  explicit
• off-color
• offensive
• obedient
• on the level
• orgiastic
• obdurate
• odious
• old
• overkeen
• out-and-out
• off-colour
• off colour
• open
• overt
• ossified